It signifies empathy and an understanding of others' states of mind. It is commonly observed among animals as well, not just humans. Interestingly, studies have shown that contagious yawning is more likely to occur between individuals who have a close relationship or strong social bonds. It is also more likely to occur within certain age groups, such as children and young adults. In summary, yawning is contagious due to the activation of mirror neurons in our brain, which promote empathy and social bonding.
